Archive for September 2009

QED homework 2

22 September 2009

Here is the second homework for the QED topics class.   M. worked up to the Klein-Gordon equation from Schrödinger’s equation, and worked though some dimensional analysis examples, and calculus of variations.

QedHomework_2009_09_22

I was very pleased to find Mark Srednicki has posted a draft of his book on QFT, the first couple of chapters parallel things M. is demonstrating.  Pretty useful.

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Free electron laser

15 September 2009

Other institutions that are using or investigating free electron lasers include:

Free electron laser at Berkeley / SLAC

15 September 2009

There is an interesting research area that Berkeley Labs and SLAC are getting into that might work for me.  The project is a free electron laser (FEL), which is being coordinated by John Corlett of the Berkeley Lab Accelerator and Fusion Research Division.   A photoemission cathode will be used to pulse out groups of about 10^6 electrons that will be streamed through a linear accelerator and then accelerated/decelerated in pulses yielding x-rays.  The goal of this is to produce a very high quality light-source.

Project Euler #254

12 September 2009

This week worked intently on Problem 254 on Project Euler, which is very interesting.  Didn’t solve it, but did type up my notes here – ProjectEuler254.

QED homework 1

8 September 2009

M.U. at work has been offering to lecture on topics in QED, leading up to the construction of Feynman diagrams.   There is no textbook, but I volunteered to compose assignments after each lecture for the class.  This is the first homework for the QED topics class, touching on gamma matrices and unitary matrices.

QedHomework_2009_09_08

King’s Singers

8 September 2009

The King’s Singers are squarely excellent musically.  I have been loving this particular piece, Deconstructing Johnan, for a couple of years now.  It is beautifully set, interesting, active and funny.

Concepts of Modern Physics

6 September 2009

ConceptsOfModernPhysicsRead through Concepts of Modern Physics by Beiser in July, August and September.  It provided a great review and overview, and filled in several gaps in my knowledge.   I took tons of notes, but haven’t worked them up into latex (not sure how useful this would be – I have other areas that need my focus).

For me this book was perfect – high level of detail and consistent expectations of the reader.